CN210374114U

CN210374114U - A solar thermal photovoltaic integrated device based on heat pump

Info

Publication number: CN210374114U
Application number: CN201920938668.9U
Authority: CN
Inventors: 管建峰; 刘华雷; 王顺沩; 李越
Original assignee: Changshu Institute of Technology
Current assignee: Ningxia Renheng Technology Co ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-04-21
Anticipated expiration: 2029-06-21

Abstract

The utility model discloses a solar photothermal photovoltaic integrated device based on heat pump, including photovoltaic cell panel, the heat absorption coil pipe sets up and connects gradually first valve through first pipeline in the export of photovoltaic cell panel backside heat absorption coil pipe, vapour and liquid separator and heat pump, the heat release coil pipe in the first water tank of export second tube coupling of heat pump, third tube coupling second valve and expansion valve are passed through in the export of heat release coil pipe, the expansion valve passes through fourth tube coupling heat absorption coil pipe, first water tank is equipped with cold water moisturizing valve and hot water valve that drains, the second water tank is connected to the hot water valve that drains, first water tank sets up highly to be higher than the heat absorption coil pipe and sets up the height, be connected with the third valve parallelly connected with the heat pump between first pipeline and the second pipeline, be connected with the fourth valve parallelly connected with the expansion valve between third pipeline and the fourth pipeline, controller control system moves with heat pipe or heat pump mode. The utility model discloses can solve the poor problem of radiating effect behind the water tank temperature height, maintain higher generating efficiency and prepare hot water simultaneously.

Description

Solar photo-thermal photovoltaic integrated device based on heat pump

Technical Field

The utility model relates to a solar photothermal photovoltaic integrated device especially relates to a solar photothermal photovoltaic integrated device based on heat pump.

Background

Photovoltaic light and heat all-in-one device among the prior art has reached the dual-purpose function of electricity generation and heating. The main structure is as follows: the solar photovoltaic cell panel is characterized in that a heat absorption device aluminum pipe is arranged below the solar photovoltaic cell panel, the solar cell panel is externally connected with a controller, an inverter and a storage battery pack, and a water connection large water tank is arranged in the aluminum pipe. The device has the following action principle: the sunlight irradiates on a photovoltaic cell panel, namely a semiconductor p-n junction to form a new hole-electron pair, under the action of an electric field built in the p-n junction, holes flow from an n area to a p area, electrons flow from the p area to the n area, and a circuit is switched on to form current, so that the current is converted into direct current or alternating current. Because the photovoltaic panel can generate heat when in work, the photoelectric conversion efficiency can be greatly reduced along with the temperature increase. Therefore, in the prior art, the aluminum pipes distributed under the light plate (filled with water) play a role in cooling the photovoltaic panel, on the other hand, water in the aluminum pipes absorbs heat, hot water moves upwards and flows into a water tank for storing water due to the principle of expansion with heat and contraction with cold, so that cold water flows downwards, the photovoltaic panel is continuously cooled, the photovoltaic panel absorbs heat, and the circulation is repeated.

However, the photovoltaic and photothermal integrated machine device with the structure often has the following problems:

1. the photovoltaic photo-thermal integrated plate has the defects that the heat absorption device adopts an aluminum pipe filled with water, and in order to achieve the cooling effect, the pipe diameter of the aluminum pipe is larger, so that the overall size of the photovoltaic photo-thermal integrated plate is increased;

2. the heat conduction efficiency of the aluminum pipe is not optimal, and heat generated on the photovoltaic cell panel cannot be absorbed in time;

3. water filled in the aluminum pipe is difficult to avoid and easy to corrode under long-time work, and leakage of water on the inner surface is caused to cause damage to the photovoltaic cell panel.

4. In the working principle: the heat generated by the photovoltaic cell panel is absorbed and taken away by the water in the bottom aluminum pipe, so that the photovoltaic cell panel is cooled, the power generation efficiency is improved, and the temperature in the water tank is also raised. But under the circumstances that ambient temperature is higher, illumination is strong, and the heat that photovoltaic cell board produced is big, and the water tank heat dissipation is slow, and the temperature of water in the water tank just reaches higher value in the very short time of photovoltaic cell board probably work, and the cooling effect of water cycle in the aluminum pipe weakens greatly this moment, and the last produced heat of photovoltaic just is difficult to be absorbed.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art defect, the utility model discloses a task lies in providing a solar photothermal photovoltaic integrated device based on heat pump, adopts heat pipe and heat pump mode switching work to make photovoltaic cell board have lower operating temperature, overcomes the problem that generating efficiency reduces.

The utility model discloses technical scheme is such: a solar photo-thermal photovoltaic integrated device based on a heat pump comprises a photovoltaic cell panel, a heat absorption coil, a first water tank, a heat release coil, a second water tank and a controller, wherein the heat absorption coil is arranged on the back side of the photovoltaic cell panel to absorb heat of the photovoltaic cell panel, an outlet of the heat absorption coil is connected with a first valve through a first pipeline, the first valve is connected with an inlet of a gas-liquid separator, an outlet of the gas-liquid separator is connected with an inlet of a heat pump, an outlet of the heat pump is connected with an inlet of the heat release coil through a second pipeline, the heat release coil is arranged in the first water tank, an outlet of the heat release coil is connected with a second valve through a third pipeline, the second valve is connected with an expansion valve, the expansion valve is connected with an inlet of the heat absorption coil through a fourth pipeline, and the first water tank is provided with a cold water replenishing valve and a, the hot water drain valve is connected with the second water tank, the setting height of the first water tank is higher than that of the heat absorption coil pipe, a third valve which is connected with the first valve, the gas-liquid separator and the heat pump in parallel is connected between the first pipeline and the second pipeline, a fourth valve which is connected with the second valve and the expansion valve in parallel is connected between the third pipeline and the fourth pipeline, the controller is connected with an environment temperature sensor, and the controller controls the first valve, the second valve, the third valve, the fourth valve and the heat pump to work according to the environment temperature measured by the environment temperature sensor.

Furthermore, an insulating layer and a heat absorption metal plate are sequentially arranged on the back side of the photovoltaic cell, the insulating layer and the heat absorption metal plate are bonded through a heat conducting adhesive, the heat absorption coil is connected with the heat absorption metal plate in a welding mode, and the surfaces of the heat absorption coil and the heat absorption metal plate are covered with heat insulation layers.

Furthermore, a liquid storage device is arranged on the third pipeline, and a connection point of the fourth valve and the third pipeline is located between the liquid storage device and the second valve.

Furthermore, a fifth valve is arranged on the first pipeline, a connection point of the third valve and the first pipeline is located between the fifth valve and the first valve, a sixth valve is arranged on the fourth pipeline, and a connection point of the fourth valve and the fourth pipeline is located between the expansion valve and the sixth valve.

Furthermore, a thermometer and a pressure gauge are respectively arranged on the first pipeline between the outlet of the heat absorption coil and the connection point of the third valve and the first pipeline, on the second pipeline between the outlet of the heat pump and the connection point of the third valve and the second pipeline, and on the fourth pipeline between the inlet of the heat absorption coil and the connection point of the fourth valve and the fourth pipeline.

Further, a dryer is arranged between the second valve and the expansion valve.

The utility model adopts the technical scheme that when the ambient temperature is lower than a certain temperature threshold value, the controller controls the third valve and the fourth valve to be opened, the first valve and the second valve are closed, the gas-liquid separator, the heat pump and the expansion valve are isolated to form a heat pipe system, the heat of the photovoltaic cell panel is absorbed by the heat absorption coil and then released in the first water tank, and the working medium in the heat absorption coil circularly absorbs heat and releases heat to dissipate the heat of the photovoltaic cell panel; when the ambient temperature is higher than a certain temperature threshold value, the controller controls to open the first valve and the second valve, close the third valve and the fourth valve, open the heat pump to form a heat pump system, after the heat of the photovoltaic cell panel is absorbed by the heat absorption coil, the working medium in the heat absorption coil is further pressurized by the heat pump, and then the heat is released and condensed in the first water tank, and the heat is absorbed circularly.

Compared with the prior art, the utility model the advantage lie in: the utility model adopts the method of switching the heat pipe and the heat pump mode to keep the photovoltaic cell panel in good heat radiation condition, which is more beneficial to the internal photoelectric conversion and overcomes the defect of low power generation efficiency originally; the two modes are switched according to the environmental temperature, more domestic or industrial water (60 ℃) can be prepared with maximum efficiency, and the power generation efficiency can be improved to the maximum extent, thereby achieving multiple purposes.

Drawings

Fig. 1 is a schematic structural diagram of a solar photo-thermal photovoltaic integrated device based on a heat pump.

Fig. 2 is a schematic view of an integrated structure of a photovoltaic cell panel and a heat absorption coil.

Fig. 3 is a schematic side view of an integrated structure of a photovoltaic cell panel and a heat absorbing coil.

Fig. 4 is a partially enlarged view of a portion a of fig. 3.

Fig. 5 is a schematic cross-sectional view of an integrated structure of a photovoltaic cell panel and a heat absorbing coil.

Detailed Description

The present invention will be further described with reference to the following examples, which should not be construed as limiting the invention.

Referring to fig. 1, the heat pump-based solar photo-thermal photovoltaic integrated device according to the present embodiment includes a photovoltaic cell panel 1, a heat absorption coil 2, a first water tank 3, a heat release coil 4, a second water tank 5, and a controller. The heat absorption coil 2 is arranged on the back side of the photovoltaic cell panel 1 to absorb heat of the photovoltaic cell panel, and is specifically structured as shown in fig. 2 to 5, and sequentially comprises toughened glass 6, a first EVA layer 7, the photovoltaic cell panel 1, a second EVA layer 8, an insulating layer 9, a heat absorption metal plate 10, the heat absorption coil 2, a heat insulation layer 11 and a back plate 12 from top to bottom. The heat absorption metal plate 10 and the heat absorption coil pipe 2 can be made of copper materials, the heat absorption metal plate 10 and the heat absorption coil pipe 2 are connected through laser welding to guarantee heat conduction efficiency, the insulating layer 9 and the heat absorption metal plate 10 are bonded through heat conduction sealing glue, the heat insulation layer 11 covers the surfaces of the heat absorption coil pipe 2 and the heat absorption metal plate 10, then the heat insulation layer and the back plate 12 are bonded through sealing glue, the left side and the right side of the heat absorption coil pipe are fixed through fixing frames 13, and the edge of an.

The outlet of the heat absorption coil 2 is connected with a first valve 15 through a first pipeline 14, and a fifth valve 16 is arranged on the first pipeline 14. The first valve 15 is connected with an inlet of the gas-liquid separator 17, an outlet of the gas-liquid separator 17 is connected with an inlet of the heat pump 18, an outlet of the heat pump 18 is connected with an inlet of the heat releasing coil 4 through a second pipeline 19, and the heat releasing coil 4 is arranged in the first water tank 3. The outlet of the heat releasing coil 4 is connected with a second valve 21 through a third pipeline 20, and a liquid storage device 22 is arranged on the third pipeline 20. The second valve 21 is connected to a dryer 23, the dryer 23 is connected to an expansion valve 24, the expansion valve 24 is connected to an inlet of the heat absorbing coil 2 through a fourth pipe 25, and a sixth valve 26 is provided on the fourth pipe 25. The first water tank 3 is provided with a cold water replenishing valve 27 and a hot water drain valve 28, the hot water drain valve 28 is connected with the second water tank 5, and the first water tank 3 is higher than the heat absorption coil 2, so that the working medium in the heat release coil 4 can flow back to the heat absorption coil 2 under the action of gravity. A third valve 29 is connected between the first line 14 and the second line 19, which third valve 29 is arranged in parallel with the first valve 25, the gas-liquid separator 17 and the heat pump 18, and the connection point of the third valve 29 to the first line 14 is located between the fifth valve 16 and the first valve 15. A fourth valve 30 connected in parallel with the second valve 21, the dryer 23, and the expansion valve 24 is connected between the third pipe 20 and the fourth pipe 25, and a connection point of the fourth valve 30 and the third pipe 20 is located between the reservoir 22 and the second valve 21. The connection point of the fourth valve 30 to the fourth line 25 is located between the expansion valve 24 and the sixth valve 26. A temperature gauge and a pressure gauge are provided on the first line 14 between the outlet of the adsorption coil 2 and the connection point of the third valve 29 to the first line 14, on the second line 20 between the outlet of the heat pump 18 and the connection point of the third valve 29 to the second line 20, and on the fourth line 25 between the inlet of the adsorption coil 2 and the connection point of the fourth valve 30 to the fourth line 25, respectively. In the closed pipeline system, R134a is used as a working medium, and a heat pipe or heat pump working system is formed by switching on and off valves to continuously dissipate heat of the photovoltaic cell panel 1 and produce hot water.

The specific operation control is performed by a controller (not shown in the figure), the controller can be installed at any position, and is connected with an ambient temperature sensor (not shown in the figure), and the controller controls the first valve 15, the second valve 21, the third valve 29, the fourth valve 30, the fifth valve 16, the sixth valve 26 and the heat pump 18 to operate according to the ambient temperature measured by the ambient temperature sensor. The threshold of the ambient temperature is generally set to 25 degrees celsius, and when the ambient temperature is less than 25 degrees celsius during a day, the controller controls the first valve 15 and the second valve 21 to close, controls the third valve 29, the fourth valve 30, the fifth valve 16 and the sixth valve 26 to open, and does not start the heat pump 18, and at this time, the system is in the heat pipe mode and also in the self-circulation mode. Under the mode, the photovoltaic cell panel 1 absorbs solar irradiation energy, the temperature rises, the heat is conducted to the R134a working medium in the heat absorption coil pipe 2, the temperature of the working medium rises, the working medium is heated and evaporated into a gas state, the gas state rises to the first water tank 3 along the pipeline, the heat release coil pipe 4 in the first water tank 3 releases heat to supply cold water, and the cold water is heated. When the ambient temperature is higher than 25 ℃, the controller controls the third valve 29 and the fourth valve 30 to close, controls the first valve 15, the second valve 21, the fifth valve 16 and the sixth valve 26 to open, and starts the heat pump 18, wherein the system is in a heat pump mode. In this mode, the heat pump 18 pressurizes the working medium in the system pipeline, the working medium flows in a passive cycle, the working medium in the pipeline between the sixth valve 26 and the first valve 15 is in a low-pressure state, and the working medium in the rest of the pipelines is in a high-pressure state according to the direction of the pipeline. In the pipeline between the sixth valve 26 and the first valve 15, the working medium is changed into a high-temperature gaseous state from a condensed gaseous state, gas-liquid separation is carried out in the gas-liquid separator 17, the high-temperature working medium is pressurized and heated by the heat pump 18, enters the heat release coil 4 in the first water tank 3, releases heat (namely heats water in the first water tank 3), then releases the superheated working medium, is in a gas-liquid coexisting state, is decompressed by the expansion valve 24 to form a gaseous condensing medium, and the part of the photovoltaic cell panel 1 absorbs heat through the heat absorption coil 2 to form the high-temperature gaseous state, so that circulation is carried out. In the heat pipe mode, when the temperature of water in the first water tank 3 reaches 60 ℃, the system immediately switches the heat pump mode (in order to ensure that the photovoltaic cell panel 1 is continuously cooled), opens the hot water drain valve 28 to pump all hot water to the second water tank 5, closes the hot water drain valve 28, then opens the cold water replenishing valve 27, puts cold water into the first water tank 3, closes the cold water replenishing valve 27, then closes the heat pump mode, and opens the heat pipe mode. In the heat pump mode of 25 ℃, the temperature in the first water tank 3 reaches 60 ℃, and the first water tank 3 does not need to be switched to the second water tank 5 when delivering hot water, so that the original mode is maintained. The existence of second water tank 5 can deposit and supply life or industry usefulness by the 3 exhaust hot water of first water tank, makes 3 inside keeping low temperature states of first water tank, does the preparation for absorbing the heat on photovoltaic cell board 1 constantly, guarantees the continuation of the work of system one day, also can prevent simultaneously under ordinary heat pipe mode, because the too high problem that can't satisfy 1 heat absorption requirements of photovoltaic cell board of water temperature causes the efficiency to descend in first water tank 3.

Claims

1. A solar thermal photovoltaic integrated device based on a heat pump, characterized in that, comprising a photovoltaic cell panel, a heat absorbing coil, a first water tank, a heat releasing coil, a second water tank and a controller, the heat absorbing coil It is arranged on the back side of the photovoltaic cell panel to absorb the heat of the photovoltaic cell panel. The outlet of the heat absorbing coil is connected to a first valve through a first pipeline, and the first valve is connected to the inlet of the gas-liquid separator. The outlet of the gas-liquid separator is connected to the inlet of the heat pump, and the outlet of the heat pump is connected to the inlet of the heat release coil through a second pipeline, and the heat release coil is arranged in the first water tank. The outlet of the heat-releasing coil is connected to a second valve through a third pipeline, the second valve is connected to an expansion valve, and the expansion valve is connected to the inlet of the heat-absorbing coil through a fourth pipeline, and the first water tank is provided with There are a cold water replenishment valve and a hot water discharge valve, the hot water discharge valve is connected to the second water tank, the height of the first water tank is higher than the height of the heat absorption coil, the first pipeline and the second A third valve connected in parallel with the first valve, the gas-liquid separator and the heat pump is connected between the pipelines, and the second valve and the expansion valve are connected between the third pipeline and the fourth pipeline A fourth valve arranged in parallel, the controller is connected with an ambient temperature sensor, and the controller controls the first valve, the second valve, the third valve and the fourth valve according to the ambient temperature measured by the ambient temperature sensor And the heat pump works.

2 . The solar thermal photovoltaic integrated device based on a heat pump according to claim 1 , wherein an insulating layer and a heat-absorbing metal plate are sequentially arranged on the back side of the photovoltaic cell, and the insulating layer and the heat-absorbing metal plate are arranged in sequence. 3 . The heat-absorbing coil is welded and connected to the heat-absorbing metal plate by bonding with a heat-conducting glue, and the surfaces of the heat-absorbing coil and the heat-absorbing metal plate are covered with an insulating layer.

3 . The solar thermal photovoltaic integrated device based on a heat pump according to claim 1 , wherein the third pipeline is provided with a liquid accumulator, and the connection point between the fourth valve and the third pipeline is 3 . between the reservoir and the second valve.

4 . The solar thermal photovoltaic integrated device based on heat pump according to claim 1 , wherein the first pipeline is provided with a fifth valve, and the connection point between the third valve and the first pipeline is 4 . is located between the fifth valve and the first valve, the fourth pipeline is provided with a sixth valve, and the connection point between the fourth valve and the fourth pipeline is located between the expansion valve and the Between the sixth valve.

5 . The solar thermal photovoltaic integrated device based on heat pump according to claim 1 , wherein the connection point between the outlet of the heat absorption coil and the connection point between the third valve and the first pipeline is 5 . On the first pipeline, on the second pipeline between the outlet of the heat pump and the connection point between the third valve and the second pipeline, and on the inlet of the heat absorbing coil and the first pipeline. A thermometer and a pressure gauge are respectively provided on the fourth pipeline between the connection points of the four valves and the fourth pipeline.

6 . The solar thermal photovoltaic integrated device based on a heat pump according to claim 1 , wherein a dryer is provided between the second valve and the expansion valve. 7 .